Okay, Kean's site i known and it contains unfortunately no solution.
I beleave now, the problem is not the debugging setting from visual studio,
but is an problem from the rendering context.
An similar effekt i know from acad2011 and XAML in dll. On this time i must manipulate the acad.exe.config and set the
"probing privatePath=" so that acad like to work with XAML+MVVM.
But now on 2014 i use the plugin-autoloader.
Use anybody an XAML-Window and works the brakepoints on example "Click-Event" ?